Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessLure victim to crafted HTML page
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ExploitPage triggers incorrect authorization check
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ExecutionBrowser leaks sensitive cross-origin data
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ImpactAttacker exfiltrates information
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization logic validation
MITRE ATT&CK
1 technique across 1 tactic: Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Requires the victim to actively open or navigate to an attacker-crafted HTML page in a vulnerable Chrome desktop build prior to 155.0.8059.39 (UI:R); there is no authenticated-session or special configuration prerequisite in the product itself. Exploitation is limited by that mandatory user interaction, by the confidentiality-only, vendor-rated-Low nature of the leak (no code execution or data modification implied), and by Chrome's automatic update mechanism, which rapidly closes the window on patched installations. |
| Impact | The signals here conflict sharply and must be reconciled before prioritization. The input CVSS vector (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H = 8.8 High) claims full high confidentiality, integrity AND availability impact, but the description characterizes the flaw strictly as an information-disclosure issue ('allowed a remote attacker to obtain sensitive information'), and the vendor (Chromium) explicitly rated the security severity as LOW. These are inconsistent: a pure info-leak should carry impact on confidentiality only (I:N/A:N), so the 8.8 score appears inflated and should not drive prioritization on its own - verify against Google's advisory. No EPSS score, no CISA KEV listing, and no public POC were provided, so there is no evidence of active or imminent exploitation. CWE-863 (incorrect authorization) combined with 'crafted HTML page' and UI:R points to a same-site/cross-origin data-leak reachable only when a victim is lured to a malicious page. Net assessment: despite the headline 8.8, the vendor's own 'Low' rating, the confidentiality-only description, the user-interaction requirement, and the absence of any exploitation signal indicate this is a routine browser info-leak to be remediated via normal Chrome auto-update cadence, not an emergency. |
| Exploit ScenarioDerived | An attacker hosts a crafted HTML page and lures a victim running a Chrome build prior to 155.0.8059.39 to visit it (via phishing link, ad, or malicious redirect). An incorrect-authorization flaw in the browser then lets the page read sensitive information it should not be able to access (e.g., cross-origin or privileged browser data). No public exploit code was identified at time of analysis, and exploitation requires the user to open the attacker-controlled page. |
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Alert meAnalysisAIv1 – Oct 06, 2026
The signals here conflict sharply and must be reconciled before prioritization: the supplied CVSS 3.1 base score of 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) and the 'Authentication Bypass' tag imply full compromise, while the authoritative assessed vector AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N describes only a confidentiality impact with mandatory user interaction. As assessed, an unauthenticated remote attacker can obtain sensitive information from Google Chrome desktop builds prior to 155.0.8059.39 when a victim opens a crafted HTML page, with no integrity or availability impact and no authenticated-session or special-configuration prerequisite in the product itself. There is no CISA KEV listing and no public exploit code identified at time of analysis, Chromium rates the underlying issue Low severity, and the vendor-released patch is Chrome 155.0.8059.39.
RemediationAI
Vendor-released patch: upgrade to Google Chrome 155.0.8059.39 or later, available from the Chrome stable channel per https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_086471744.html, with technical detail at https://issues.chromium.org/issues/553270559. Confirm the running build at chrome://version after updating, since Chrome's automatic updater normally handles this but may be delayed by long-lived browser sessions; enterprise administrators should enforce update and relaunch through managed policies (for example RelaunchNotification or a managed update channel) at the cost of interrupting user sessions. Because exploitation requires the victim to open a crafted HTML page, there is no practical network or endpoint signature to block and no feature flag that removes the exposure; compensating controls are therefore limited to reducing the vulnerable surface while patching - restricting sensitive browsing workloads to an up-to-date profile or a disposable virtualized/remote session, and constraining use of unmanaged or frozen Chromium-derived builds - each of which carries usability and management overhead and should be treated as temporary. Verify that Chromium-based third-party browsers have rebased onto 155.0.8059.39 before considering the estate clean.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
The root cause is CWE-863 (Incorrect Authorization) in Chrome's 'Browser' component, i.e. the browser-process layer that evaluates origin, permission and site-isolation checks before script-visible data is exposed to web content. Rather than a memory-safety defect, this is an authorization-logic failure: a crafted HTML page can cause a data-access check to be evaluated incorrectly, returning information the rendering context is not entitled to. The CPE entry cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:* enumerates all Chrome builds before the fixed release, and ENISA EUVD-2026-93631 records the affected range as versions prior to 155.0.8059.39. Consistent with the assessed vector, the flaw is reachable remotely without authentication (PR:N) but only when the victim loads an attacker-supplied page (UI:R), scope is unchanged, and the consequence is disclosure of information rather than code execution or modification. The Chromium severity rating of Low aligns with the assessed confidentiality-only reading and stands in contrast to the 8.8 score circulating elsewhere. Tracking references are the Chrome stable-channel advisory and Chromium issue 553270559, which carry the technical detail for the fix.
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Severity by source
Sources disagree (Low–High)AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Remote, no privileges, but victim must open a crafted page (UI:R); impact is limited sensitive-information disclosure only (C:L), matching the Chromium 'Low' rating, with no integrity or availability impact.
vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.
CVSS VectorVendor: Chrome
Lifecycle Timeline
4DescriptionCVE.org
Incorrect authorization in Browser in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to obtain sensitive information via a crafted HTML page. (Chromium security severity: Low)
Executive ViewAI
Google Chrome desktop versions prior to 155.0.8059.39 are affected by a high-severity vulnerability that could allow an unauthenticated remote attacker to obtain sensitive information when a user opens a crafted HTML page. While exploitation requires user interaction and there is no public exploit identified at time of analysis, the widespread deployment of Chrome across the organization means that a successful attack could lead to data leakage. Vendor-released patch: Chrome 155.0.8059.39; prioritize deployment to mitigate risk.
Apply vendor patch.
Threat Intelligence Overview
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
EUVD-2026-93631
GHSA-xx3q-rpjx-26cv
NVD
CVE.org
EPSS
Vulnrichment
VulDB
Exploit-DB